the Seattle Corporation has been presented with an investment opportunity which will yield cash flows of $30,000 per year in Years 1 through 4, $35,000 per year in Years 5 through 9, and $40,000 in Year 10. This investment will cost the firm $100,000 today, and the firm's cost of capital is 10%. Assume cash flows occur evenly during the year. The discounted payback period is?